boone.util

Class RootSolver

java.lang.Object

boone.util.RootSolver

public class RootSolver
extends java.lang.Object

This class contains methods to find roots and limits of functions. Some methods are only reliable for functions that describe the form of emitted, or the effect of received spikes, in the context of the simulation of spiking neural networks.

Version:

$Id: RootSolver.java 2239 2014-11-15 jmory $

Author:

Johannes Mory

Constructor Summary

Constructors

Constructor and Description
RootSolver()

Method Summary

Modifier and Type	Method and Description
double	calcLimit(Function f, int type, double limit) Calculates the point at which the specified function will fall below a given bound.
double	findRoot(Function f, double start, double end) Searches for the first root r inside the specified interval such that f'(r) >= 0.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

RootSolver

public RootSolver()

Method Detail

findRoot

public double findRoot(Function f,
                       double start,
                       double end)

Searches for the first root r inside the specified interval such that f'(r) >= 0.

Parameters:

f - the function to search

start - the lower bound of the search interval

end - the upper bound of the search interval

Returns:

the first root with f'(r) >= 0 if found, else Double.NaN

calcLimit

public double calcLimit(Function f,
                        int type,
                        double limit)

Calculates the point at which the specified function will fall below a given bound. This method is only reliable for functions that describe the form of emitted, or the effect of received spikes, in the context of the simulation of spiking neural networks. If the specified type is not supported a NotImplemented exception is thrown.

Parameters:

f - a function that describes the form of an emitted, or models the effect of a received spike

type - either SpikeEvent.PRE_SPIKE, or SpikeEvent.POST_SPIKE

limit - the value of the bound

Returns:

the point at which the function value falls below the specified bound